137656939 has 32 divisors (see below), whose sum is σ = 174337920. Its totient is φ = 105971712.

The previous prime is 137656921. The next prime is 137656943. The reversal of 137656939 is 939656731.

137656939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 137656939 - 2⁷ = 137656811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137656892 and 137656901.

It is not an unprimeable number, because it can be changed into a prime (137656979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389787 + ... + 390139.

It is an arithmetic number, because the mean of its divisors is an integer number (5448060).

Almost surely, 2^137656939 is an apocalyptic number.

137656939 is a deficient number, since it is larger than the sum of its proper divisors (36680981).

137656939 is a wasteful number, since it uses less digits than its factorization.

137656939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its digits is 918540, while the sum is 49.

The square root of 137656939 is about 11732.7293926009. The cubic root of 137656939 is about 516.3363527730.

The spelling of 137656939 in words is "one hundred thirty-seven million, six hundred fifty-six thousand, nine hundred thirty-nine".